<template>
  <el-breadcrumb
    class="app-breadcrumb"
    separator
  >
    <transition-group name="breadcrumb">
      <el-breadcrumb-item
        v-for="(item,index) in levelList"
        :key="item.path"
      >
        <span
          v-if="item.redirect==='noRedirect'||index==levelList.length-1"
          class="no-redirect"
        >{{ $t(item.meta.title) }}</span>
        <a
          v-else
          class="no-redirect"
          @click.prevent="handleLink(item)"
        >{{ $t(item.meta.title) }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from 'path-to-regexp'

export default {
  data() {
    return {
      levelList: null
    }
  },
  watch: {
    $route() {
      this.getBreadcrumb()
    }
  },
  created() {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb() {
      // only show routes with meta.title
      let matched = this.$route.matched.filter(
        (item) => item.meta && item.meta.title
      )
      const first = matched[0]
      // const last = matched[matched.length - 1];

      if (!this.isDashboard(first)) {
        matched = [{ path: '/dashboard', meta: { title: 'menu.home' }}].concat(
          matched
        )
        // matched = [{ path: "/dashboard", meta: { title:'menu.home' } }]
      }

      this.levelList = matched.filter(
        (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
      )
    },
    isDashboard(route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
    },
    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    handleLink(item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      console.log(this.pathCompile(path))
      this.$router.push(this.pathCompile(path))
    }
  }
}
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 40px;
  // margin-left: 8px;
  .el-breadcrumb__item:first-child > a ~ span {
    background: none;
  }

  .no-redirect {
    color: #404040;
    font-size: 14px;
    padding: 0px 20px;
    position: relative;
    cursor: pointer;
    border-top: 2px solid #fff;
    background: url('../../assets/icon/line.png') no-repeat left center;
    background-size: 1px 15px;
  }
}
</style>
